After a man fatally stabbed a woman, he walked into a Queens grocery store covered in blood and purchased Coors Light.

Melissa Nash

A MAN fatally stabbed a woman in the hallway of a Queens apartment building Monday night — and then, covered in blood, coolly strolled to a local grocery and bought a Coors Light, police and a witness said.

The killer, who at least three neighbors said was in a romantic relationship with his 33-year-old victim, got away after his shocking pit stop at the Jazmina Grocery in Elmhurst.

“What surprised me the most was that he went to buy a beer with the blood all over him and his arms,” said local resident Betsy Hurtado, 30, who was outside the store and saw the suspect waltz out, carrying the cold one.

The scene of the crime was across from the grocery on Hampton St. Building residents said the couple’s argument started in a seventh-floor flat and continued out into the hallway, elevator and lobby. The woman, whose name police did not immediately release, was found in the hallway of the apartment. She had been beaten and stabbed multiple times, officials said.

She was taken by ambulance to Elmhurst Hospital Center, just a few blocks away, at about 8:50 p.m., but died less than hour later, police said. Detectives are investigating the crime as a possible domestic dispute. A knife was recovered at the scene.

As of early Tuesday, blood stains were visible on the grocery’s floor, near the counter.